Road-scraper.



No. 645,!36. Patented Mar. I3, |900. B. F. SHUART.

ROAD SCRAPER.

(Application led May 15, 1890.) (N0 HDMI.) 2 Sheets-Sheet I.

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No. 645,136. Patented Mar. I3, |900. B. F. SHUART. RAD SCRAPER. (Application led May 15, 1899.)

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UNITED STATES PATENT OFFICE.

nENJAMiN E. sHUART, or OEERLIN, oI-no.

ROAD-SCRAPER.

SPECIFICATION forming part of Letters Patent No. 645,136, dated March 13, 1900. Application led May 15,1899. Serial No. 716,870. (No modali) To all whomit may con/cern:

Be itknown that I, BENJAMIN F. SHUART, a citizen of the United States, residing at Oberlin, in the county of Lorain and State of Ohio, have invented certain new and useful Improvements in Road-Scrapers; and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to road-scrapers, and is an improvement on the invention embodied in Letters Patent granted to me May 22, 1894, No. 520,085.

In the accompanying drawings, Figure l is a perspective elevation of my improved machine, and Fig. 2 is a plan view thereof. Fig. 3 is a sectional elevation on line 3 3, Fig. Fig. 4t is an enlarged perspective rear elevation of one end of the scraper and of the drag-bar connected therewith. Fig. 5 is a partial cross-section of the machine on line 5 5, Fig. 3, and disclosing especially one of the guide-disks or rolling colters used in this machine to maintain the direction of travel, as hereinafter fully described. Fig. 6 is a detail in section of the device for fixing the vertical inclination of the blade. Fig. 7 is an elevation of a part of the machine, showing a modification in the fender.

In all my machines as hitherto constructed the scraper-blade has been placed transversely of the machine at its rear, so that it would carry the earth before it, either for distribution to uneven places, leaving a uniformly-even surface behind, or drawing the earth to points where it could be unloaded by raising the scraper-blade, the side fenders cooperating in these operations by confining theearth at the ends of the blade; but for roadwork especially it has been found desirable to have a side discharge for the scraper or scraper-blade, whereby the earth can be moved laterally and discharged during the continuous forward travel of the machine. To this end the scraper-blade is set at such inclination to the direction of travel as will convey the earth to one side while the scraper is doing its other Work, thus unloading as it goes and depositing the earth outside its travel. l

To these ends I employ a main frame A,

' as usual, with wheels to carry the same and means at the rear particularly to raise and lower the frame in respect to the wheels as may be desired and as is now well known in my machine, and constitutes no part of the present invention.

B is the scraper or scraper-blade, preferably curved to the segment of a circle in cross-section, though this is not necessary,

and extending the full width of the machine.

Two drag-bars D-one for each end-are connected at their front to uprights or posts cl, having a rotary pivot in sockets or bearings d', secured to the front cross portion of frame A, and the said bars are provided each with a series of perforations centrally and laterally to secure the curved connecting-bars C of the scraper-blade. The bars D are preferably straight and plain, while the blade- Connecting bars C are preferably of angle or channel iron form in their straight portion 2, where they engage over the edges of the bars D, and they are adjusted therein according to the position desired for blade B, bolts serving this purpose. Either end of lthe blade B may be set in advance, and as the tendency to crowd endwise is in the direction of the advance end of the blade I provide a roller 2 at each side on the fender E 0r frame A to engage the end of theblade and take the endwise thrust and relieve friction.A

A fender E is swung at each side of the frame A to work in conjunction with the scraper, as usual, the said fenders being shown in the main views as supported at their front and top by means of a rigid forwardly-pio jecting arm 3, pivoted on the main frame and of such length that the fenders rise and fall somewhat evenly at both ends. However, differently connected and constructed fenders can be used without in any manner affecting the invention and one form of which is seen in Fig. 7, as hereinafter described.

When the scraper-blade is set at an inclination, as shown, the fender at its discharging end necessarily is raised to make room for the earth to pass out, as seen in Fig. 1. To this end a movable holder or support 5 is employed to carry the free end of the fender. Any equivalent means to this for holding this style of fender up out of the way may be employed.

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The drag-bars D may have keepers (Z2, Fig. 4, to confine the blade-carrying bars C, and they have a common and uniform adjustment vertically at their rear ends through the' racks G, the shaft H, and pinions 7L thereon, andA they each have an individual adjustment for greater or less depth in the yoke g on the lower end of rack G, in which there are a series of holes and a cross-bolt fixing the bars therein.

At the front the draft-chains Kare preferably attached directly to the ends of the dragbars instead of the posts d or the frame A, so that the strain in service will not be on the frame, but directly on said bars, and the draft continues on the chains and is not transferred to the tongue 7c'. This very greatly relieves the frame and applies the draft at the point of greatest effectiveness and economy.

In order that the machine may be caused to travel in the line of draft without deviation to either side notwithstanding the induced tendency to run to one side owing to the inclination of the blade to the direction of travel,

I have employed a series of rolling colt-ers or disks L, which are arranged under the rear platform of the machine, as here shown, and hence where the greatest weight of the machine is found. The driver is supposed to stand on this platform, and as much additional Weight may be added thereto and to the machine as may be needed at any given place to keep the parts down to work. These rolling colters are supported in forked standards M, which are perforated toward their top for vertical adjustment by means of bolts m through the brackets in. or equivalent means, and the spindle m2 of the said colters or disks is supported at its ends in bearings in the slotted guides or brackets N, fixed to the frame A and pendent therefrom. The standards M are preferably-curved to a segment, so as to throw the disks forward of a vertical plane and facilitate or promote their depression into the earth, and draw-rods `n are connected with the outer ends of the spindles m2 to divide the draft and strain, that would otherwise come chiefly on the brackets N.

Referring to Fig. 4, it will be seen that the connecting-bar C is united with the blade B below its center, preferably by means of a double joint, a yoke C' being hinged horizontally on said blade and constructed to afford a rotary axial movement of the extremity of the bar C therein. Then in order that the said scraper-blade B may be set as to verltical position or inclination and be more or less inclined vertically I may provide one means or another; but the preferred means are in this instance shown to consist of a plate O, having a set of teeth or ribs o and o on its bottom between which the blade B is engaged and which-has also a longitudinal slot for the locking-bolt o2, whereby the plate O is fixed here or there and the inclination of blade B determined for the time being, the bolt o2 in this instance entering the fla-nge of connecting-bar C.

A modification of fender appears in Fig. 7. Here the fender P has two parallel links 6 of equal length connectingit with the frame A, and in use the fender trails, as usual. When raised to any elevation, it rises uniformly at both ends and may be thrown entirely out of use, as seen in dotted lines, Fig. '7.

V'Vhat l claim is- 1. In a scraper of the Variety described, the main frame having front and rear carrying wheels, an adjustable scraper-blade set at an inclination to the line of draft across said frame and having its ends within the sides of the frame, and adjustable means to keep the blade down to work, substantially as described.

2. The scraper-frame and the blade and means to adjust the ends of `the blade back and forth in respect to each other to incline the blade more or less to the line of draft, and sharp-edged rolling members to hold the machine in the line of draft, substantially as described.

3. The main frame and front and rear wheels carrying the frame, a scraper-blade arranged transversely to the line of draft between the sides of the frame, drag-bars on which the blade is adjustable back and forth independently at each end and means to raise and lower said blade, substantially as described.

4. The main frame and the scraper-blade, a drag-bar for each end of the blade, and connecting-bars adjustable on the drag-bar and secured to the said blade, substantially as described.

5. The main frame and the scraper-blade, the drag-bars pivoted at their front on the main frame and connecting-bars intermediate of the said drag-bars and the scraperblade and independently adjustable on the drag-bars, substantially as described.

6. The scraper-blade, connecting-bars pivotally secured to the rear thereof, drag-bars carrying the said connecting-bars and vertically adjustable at their rear ends, and the main frame on which the drag-bars are secured at their front ends, substantially as described.

7. The main frame and drag-bars thereon having a series of transverse holes, connecting-bars adjustably supported on said bars by bolts through said holes, the scraper-blade having a jointed union with said connectingbars, and -mechanism to adjustably X the 'elevation of the said bars and blade in respect to the main frame, substantially as described.

S. The main frame and the pivotally-supported scraper-blade, and a roller on the said frame to engage the end of the blade, substantial-ly as described.

9. The main frame and the transverselyinclined scraper-blade therein, and verticallyadjustable rolling colters in rear of said blade,

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bifurcated standards carrying said oolters and brackets engaging the spindles of the colters, substantially as described.

10. The main frame, rolling colters there-- in and segmentally-curved standards carrying said colters, and seglnentally slotted brackets swung as guides for the colters, substantially as described.

11. The main frame and the rolling colters, curved standards carrying said colters and adjustable on said frame, brackets in which the spindles of the colters are engaged and draw-rods connected with the ends' of the said spindles, substantially as described.

12. The main frame and the rolling oolters, the standards for the colters, slotted brackets in which the colters have their bearing, and draw-rods connected with the ends of the colter-spindles, substantially as described.

13. The main frame and the scraper-blade, fenders at the ends of the blade, and means to hold either fender horizontally up out of working relation, substantially as described.

14. The main frame and the scraper-blade, draw-bars for said blade supported at their ends from said frame, and draft connections directly with the front ends of said bars and apart from the main frame, substantially as described.

15. The main frame and the scraper-blade, draw-bars on which the blade is pivotally supported, and means to adjust the Vertical inclination of the blade comprising lugs on the drag-bars in position to engage the top edge of the blade, substantially as described.

16. In a road-scraper, the main frame and the scraper-blade, a fender for said blade and a set of links supporting the fender on said frame, substantially as described.

Vtitness my hand to the foregoing specificationthisth day of May, 1899.

BENJAMIN F. SHUART.

Witnesses:

H. T. FISHER, R. B. MOSER. 

